The Coast Guard is on the scene of another oil rig fire in the Gulf of Mexico. Officials are now reporting a mile-long oil sheen spreading from the site.

Coast Guard Petty Officer Bill Coklough said the sheen, about 100 feet wide, was spotted near the burning platform. He said Mariner Energy, Inc., the Houston company that owns the rig, had deployed three firefighting vessels to the site and one already was in place fighting the blaze.

According to the Coast Guard, 13 people were on the platform when it caught fire Thursday morning. All 13 are accounted for and one injury was reported.

Rescue helicopters and Coast Guard cutters were immediately sent to the scene. The rig is in water about 340 feet deep. Mariner said this is a platform rig, not a drilling rig.